Internal-combustion motor.



F.`L. H. SIMS. INTERNAL COIVIBUSTION MOTOR.

APPUCATION FILED NOV-28.1916.

Patented Dec. 3, 1918.

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. l llllll IIIIIIIJ Gm/fm f F. L. Hpslms. INTERN/6L COMBUSNON MOTOR.

APPLICATION FILED NOV. 28. l9l6 Patented Dec. 3, 1918.

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2 SHEETS-SHEET 2.

JEREIDJERTGK L. lE-I. STMS, 0F TURONTO, NTARTO, CANADA.

INTERNAL-CGMUSTION MQTOR.

Specifica-tion of Letters Patent.

Patented Dec.. 3, T9i3.

Application filed November 28, 1916. Serial No. 133,946.

To all whom it 'may concern.'

Be it known that T, FREDERICK L. H. SIMs, of the city of Toronto, in thecounty of York, Province of Ontario, Canada, a subject of the King ofGreat Britain, have made certain new and useful Improvements inlinternal-Combustion Motors, ofwhich the following is a specification.

This invention relates particularly to the meansfor controlling theadmission of air, either in a combustible mixture or separately, and ofthe exhaust of the products of combustion from internal combustionhereinafter specifically described and illustrated in the accompanyingdrawings in WlllCll.-

Figure '1 is a longitudinal section of the cylinder and valve system ofan internal combustion motor constructed in accordance with myinvention;

Fig. 2 a plan view of the same, partly in section;

Figs. 3 and 4 enlargedsections through. the valve ring and cylinderports showing two different positions; and

Figs. 5, 6 and 7 diagrammatical developments of the cylinder wall andvalve ring showing various possible arrangements of the ports. f

lin the drawings like numerals of reference indicate corresponding partsin the different figures.

l is the cylinder, which in the main is of ordinary construction and maybe waterjacketed in theordinary manner. ll prefer, however, to form thewater-jacket by means of a removable sleeve 2 secured in position in anysuitable manner. This sleeve is preferably welded to an annular member 3.which forms a seat for the annular valve hereinafter described. Thisannular seat is preferably tapered on the inside and seats on taperedribs 4: formed on the cylinder, these ribs thus support the annular seatmember and at the same time provide water channels for the jacketing ofthe head portion of the cylinder and the valve.

The cylinder may be provided with the ordinary fixed head. T prefer,however, employing a head 5 movable axially of the cyl' inder. This headis limited in its movement outwardly by the relatively fixed head 6, forinstance, by contacting with the rim 7 of the head which is screwedwithin the cylinder end as shown.

The movable head 5 is yieldingly pressed inwardly by means of the coilsprings 8, wvhich engage both the fixed and movable head and are held inposition by the studs 9 on one of the heads. lThe movement of themovable head toward thc pistou is limited by its engagement with theshoulder 39 formed by counterboring the cylinder. though otherarrangements might, of course, be employed.

The cylinder is provided with a plurality of ports 10, which arepreferably proportioned in number to the diameter of the cylinder sothat therdistance moved by the valve at each step will not be undulylarge. For a cylinder four inches in diameter sixteen is a good number,and in larger sizes larger multiples of four will bel employed.

11 is the annular' valve which fits on the coned outer surface of theannular seat member 3. This valve is held in position by springpressure, preferably adjustable. For this purpose T provide one or morecoil springs 12 which bear against the annular valve and against a nut13 screwed on the upper part of the annular valve seat. Preferably acollar 14 is interposed between the springs and the valve, and thiscollar carries steadying studs 15 for the springs.

While the annular valve may be formed in various .ways, for conveniencein forming the ports therein, I prefer to form the valve in two parts a,b. The part a is screwed. on to the part b as shown. Through the annularvalve I form the exhaust ports 16. These preferably extend straightthrough to its outer surface.

If the ports are to be arranged on the system shown in Fig. 5, air ports17 are also formed in the annular valve, but these ports, instead ofextending straight through to the outer surface, extend diagonallyupward, as shown in Fig. 4, through the upper surface of the annularvalve.

The annular valve is given an intermittent stepwise movement, and in thecase in which the movement is effected at the end of each stroke of the4piston, the valve arrangement will be as shown in Fig. 5.

The exhaust ports correspond in number .to the cylinder ports, in thepresent case sixteen being employed. The arrangement then is thatfollowing an exhaust port is an air inlet port, following that a blankspace corresponding to two ports, then another air port and repeat, theblank space being equivalent to twice the distance from center to centerof an air and exhaust port.

As the annular valve is moved an exhaust port will be in communicationwith the cylinder port, then an air port in communication with thecylinder port, then for two movements of the valve the cylinderport isclosed off and the cycle is repeated.

The exhaust may be directly to the outer air where such disposal of itis not objectionable. For ordinary purposes, however,

an annular exhaust chamber 18 will be fitted' between the shoulders 19on the annular valve so as to maintain substantially a gas tight jointtherewith. From this annular exhaust chamber an exhaust manifold may beled to any desired point.

The exhaust chamber may be made eccentric, as indicated in the planview, to facilitate the discharge.

In Fig. 6 I show a modification in which the annular valve moves onlythree times in the cycle of the engine, that is, it moves always on theout-stroke of the piston and alternately on the in-stroke of thefpiston.

.The arrangement of the ports ofthe annular valve is then as follows:first anexhaust port, then an air port, then a blank space correspondingto the distance between centers of the exhaust and air ports. In thiscase the spacey between exhaust ports is divided by three instead of byfour, as in the arrangement shown in Fig. 5. ports may extend through tothe outer surface of the annular valve instead of through its uppersurface as in the form shown in Figs. 3, 4 and 5.

In Fig. 7 I show a further modification The air in which the air and theexhaust pass through the same ports in the valve, and the valve is movedonly twice in each cycle, that is, on the out-stroke of the piston, thedistance moved each time being half the distance between the valveports.

Various means may be employed to move the valve. I show a preferred formin Fig. 2. Though the gearing may vary, the annular valve is shown asprovided with sixtyfour gear teeth 21 at 'its outer periphery below theexhaust chamber. With thesegear teeth meshes the sixteen tooth pinion 22on the upper end of the shaft 23. The lower end of this shaft carriesthe pin wheel 24. the studs of which mesh with the cam rib 25 on the camwheel 26 fast on the crank shaft of the motor. A portion of this camlrib is shaped as a helix, but for the greater part of its length it doesnot change its position axially so that no movement of the pin wheel,with which it meshes, takes place until a change of position of thevalve is necessary, thus avoiding the constant ruiming of the annularvalve.

The rib stays in the same plane preferably for 150, then makes a shiftof 22.50 on the circumference of the pin wheel, or half of the\ pitch ofone of the wheel teeth, thus moving the pin wheel, which is eighttoothed, one tooth and the valve one sixty-fourth of a revolution. Thecam rib then stays in the same plane for another 150C and shifts asbefore, the shift being for 30 of the circumference ,of the rib.

The arrangement described is not essen tial as other arrangements whichwould answer the same purpose are quite possible.. The one shown anddescribed will run very easily and almost noiselessly, and is welladapted to my purpose.

It will be noted that the ai,` ports of the annular valve open directlyto the atmosphere, which is an arrangement best adapted for use with anengine in which the fuel is injected directly into the cylinder insteadof being drawn mixed with air, through an intake manifold from acarbureter.

As I employ a movable piston head for scavenging purposes, I am enabledto use its movements, if desired, to inject the fuel. F on this purposeI provide the center of the fixed head with the pump cylinder 37 inwhich moves the plunger Q8 secured to the movable head.

The pump cylinder is preferably provided with a stuffing box Q9 throughwhich the plunger passes. A check valve 30 is provided in the fuelconnection with the pump cylinder 27. This check valve allows of theinflow of fuel, but prevents outflow. The plunger 28 has a small boreformed through it communicating with the interior of the cylinder. Acheck valve 36 is also provided tassen in theplunger to prevent baclrtlovv. 'llhe movable head descends during the exhaust stroke of thepiston moving the pump plun ger and so filling the pump cylinder withfuel. lt remains down until compression begins, then moves up as soon asthe compression becomes sufliciently great, and in so doing injects intothe cylinder the fuel which had previously been drawn into the pumpcylinder. Thus the fuelv is injected practically at the end of thecompression strokey so avoiding premature ring.

ignition may take place either by comn pression of the mixture or byspark plug as desired. rlhe movable head may also be used as acirculation pump. lll/torts 3l may be formed `in the rim of the fixedhead communicating with ports 32 in the wall of the cylinder between theribs t. llnvvardlyl opening check valves 37 should be applied to theports 3l at one side and outwardly openin check valves at the otherside. Wa-

ter ist ius drawn in through the ports at oneside as the movable headmoves down, and forced out again at the other side as it moves up.

lill

Water spaces 33 are also formed in the annular valve communicating bymeans ot ports 3a with ports 35 formed in the valve seat. These ports,of course, are not nece=- sarily in constant communication., but aresuccessively brought into communication as the annular valve is moved.rlhe arrangen ment of the annular valve to run on a coned seat is ofgreat importance as it thus grinds itselt' to its seat and never lealrsand never binds. Y

l/lhat l claim as my invention is:

l. ln an internal combustion motor oit the tour-stroke cycle type thecombination ot a cylinder having a plurality of equally spaced portsformed in its Wall all around the combustion chamber, each serving bothas an inlet port and an exhaust port; an

" annular valve rotatably supported outside the cylinder controllingsaid ports; and means for imparting a step Wise rotary movement to saidvalve at suitable predeten mined points in the cycle of the motor, theports ot the valve being so spaced that the cylinder ports are closedduring the compression and explosion strokes of the motor.

2.' ln an internal combustion motor the combination of a cylinder havinga plurality of equally spaced port-s formed in its wall around thecombustion chamber, each serving' both as an inlet port and an exhaustport; an annular valve rotatably supported outside the cylindercontrolling said ports formed all around the same; said valve having aseries of alternated inlet and exhaust ports, the exhaust ports openingthrough a diderent surface of the valve to that through which the inletports open; and means for imparting a step-Wise rotary movement to saidvalve at suitable predetermined points in the cycle of the motor, theports of the valve being so spaced that the cylinder ports are closedduring the compression and explosion strokes of the motor.

3. lln an internal combustion motor the combination of a cylinder havinga pluralit ot' equally spaced ports formed in its Wal laround thecombustion chamber, each serving both as an inlet port and an exhaustport; `an annular valve rotatably supported outside the cylindercontrolling said ports formed all around the same, said valve having aseries of alternated inlet and exhaust ports, the exhaust ports openingthrough a different surface ot the valve to that through which the inletvalves open; an annular exhaust manifold fitted to said valve to receivethe exhaust, the valve rotating in contact with said manifold; and meansfor imparting a step-Wise rotary movement to said valve at suitablepredetermined points in the cycle oit the motor, the ports of the valvebeing so spaced that the cylinder ports are closed during thecompression and explosion strokes oit the motor..

t.' ln an internal combustion motor the combination ot a cylinder havinga plural-l ity of equally space-d ports termed in its Wall around thecombustion chamber, each serving both as an inlet port and an exhaustport; an annular valve rotatably supported outside the cylindercontrolling said ports, said valve being provided with a series ofalternated inlet and exhaust ports arranged as follows; via. an exhaustporty an inlet port, a blanlr space corresponding to two ports andrepeat; and means 'lor moving the annular valve at every strolte oit themotor a distante equal to one quarter the distance between cylinder portcenters.

5. ln an internal combustion motor the combination ot a cylinder havinga port iormed in its wall serving both as an inlet port and an exhaustport; an annular valve rotatably supported outside the cylinderconltrolling said port termed all around the same, said valve having aseries ot' alternated inlet and exhaust ports, the-exhaust ports openingthrough a did'erent surface oit the valve to that through which theinlet valves open; and means for imparting a step-Wise rotary movementto said valve at suitable predetermined points in the cycle oit themotor, the ports ot the valve being so spaced that the cylinder portsare closed during the compression and explosion strokes ot' the motor.

6. ln an internal combustion motor the combination of a cylinder having.a port formed in its wall and an exterior coned valve seat incombination with an annular valve controlling said port and fitted onsaid titi llll

ltlll ltltii illltl llo coned valve seat; spring means holding saidvalve on its seat; and means for adjusting the tension of the springmeans.

7. In an internal combustion motor the combination of a cylinder havinga plurality of equally spaced ports formed in its wall around thecombustion chamber, an annular valve rotatably supported outside thecylinder controlling said ports, said valve having 1o a series ofalternating inlet and exhaust weefsel ports; and means for imparting astep-wise movement to said valve at suitable predeter mined points inthe cycle of the motor.

Signed at Toronto, Ont., this 3rd day of April, A. D. 1916, in thepresence of the two 15 undersigned witnesses.

FREDERCK L. H. SIMS. Witnesses GEO. l?. MACKIE, D. S. TovELL.

